Is streamId unique enough for the filters?

[patriknw]

In my thinking I have come to the conclusion that we should only use the streamId. The problem I was thinking about was that producer A and producer B (different regions) would use the same streamId and then consumer in C would setup streams to both A and B. The commands would then be propagated to both A and B.

My thinking is that if that is not desired one should use different streamId in A and B even though it may be the same service and same entityType.

Originally posted by @patriknw in #826 (comment)